Means for developing films.



R. NEWMAN.

MEANS FOR DEVELOPING FILMS. QPPLICATION FILED ocr; I2. m1.

Patented Sept. 3, 1918.

INVENTOR, euben Wewman, M B) k ATTORNEY REUBEN NEWMAN, OF NEW YORK, N. Y.

. MEANS FOR DEVELOPING FILMS.

Specification of Letters Patent.

Patented Sept. 3, 1918.

. Application filed October 12, 1917. SeriaINo. 196,186.

To all whom it may concern:

Be it known that I, REUBEN NEWMAN, a citizen of the United States, and residing at New York, county and State of New York, have inventeda new and useful Improvement in Means for Developing Films, of which the following is a specification.

This invention relates to means for developing films, and is an improvement'on the construction shown'in an application filed bv me October 12, 1916, Serial No. 125,131, allowed July 19,1917.

A principal object of the present invention is to provide an improved spacerunit constituted by a plurality of open work frames hingedly connected, one to the other, which construction greatly facilitates the assembling of the parts for the developing operation. 7

A further 'object is to provide a spacer unit adapted for use in connection with pack films whereby the lead strips of said films are easily threaded through the spacer structure and brought up andheld to be conveniently grasped by the fingers when desired.

I clearly illustrate my invention in the accompanying drawing, which forms a part of this specification, and in which drawings similar reference characters are employed to designate corresponding parts throughout the several views, in which Figure 1: is a partial sectional elevation showing a portion of a camera, a film pack and my improved developing tank assembled and in operative position.

Fig. 2: is a diagrammatic horizontal section taken on the line 22 of Fig. 1.

Fig. 3: is a diagrammatic vertical sectional elevation of the spacer unit.

Fig. 1: is a fragmentary elevation of the spacer unit showing the means employed to retain the films while the lead strips are being pulled out of the tank.

Fig, 5z'is a plan view of a portion of the spacer unit showing the films in place.

Fig. 6: is a detail perspective showing a portion of the stop bar and the means for interlocking the parts.

Fig. 7: is a detail perspective view of a cap piece employed.

In the drawing I show at 10, a portion of a camera adapted to receive a film pack 11.

Made fast to the camera in any desired manner is my improved developing tank 12, provided at the bottom with a hinged end the frame edges to overly the film passages as clearly shown in Figs. 4 and 5, the films as at F, being wider than the lead strips 24,

will engage the undersides of the stop bars 19, as shown atG, when being drawn upwardly by said lead strips and will beretained in the spacer structure as will be readily understood. I I A corrugated slide or plate 21, is provided to close the passage 22, after the films have been drawn therethro ugh and into the tank to be developed, a light tight pouring spout or passage 23, being provided'as in the abov mentioned allowed application. I

After the film's have been drawn into the developing tank and arranged between the frames of the spacer unit with their lead strips or tongues 2i, projecting above the spacer unit, a cap 25, is placed on over the free ends of the frames, said cap being constructed of two parts 26, having hinged connect-ion as at 27, and being provided at the top, at their meeting edges, with felt 28, or the like, to provide a light tight oint. Said parts 26, may be provided with openings 29,

to facilitate the flow of the developing fluid in the tank.

After thecap 25, has been placed on over. the frames, the films are drawn into the tank and up between the said frames, after which the slide 21, is forced downwardlyto close the passage 22, and the cover 14, secured in position, the tank is then removed from the camera and inverted to permit ofthe developing fluid being introduced through the spout 23, as in the allowed,a )plication above referred to.

The object of corrugating the slide 21 is to permit air confined in the tank, to escape as the developing fluid enters.

I The terms andeXpressions employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any mechanical equivalents of the features shown and described, or portions thereof, but recognize that var-ions struc'-' tural modifications are possible Within the scope of the invention claimed.

What I claim is I. In combination with a developing-tank, a spacer unit comprising-open work frames hinged one to the other as described.

2. In combination with a developing tank, a spacer 'unit' comprising frames having per.- forated ears, adapted to receive pins to attach the same one to the other.

3. In combination with a developing tank, a corrugated plate slidable therein, and aspacer unit comprising open Work frames hinged one to the other as described.

4-. In combination, a developingtank, a corrugated plate slida-ble therein, a spacer unit comprising open work frames hinged together and a two part cap piece adapted to inclose the free ends of the frames as dc scribed.

5. In combination with a; developing tank,

a corrugated plate slidable therein, a plurality of frames hinged together, stop bars hinged to one frame and interlocked with another, sald' bars being arranged to he flat on the top free edges of the frames across the film passages for the purposes specified. 8. In combination w th a developing tank, a spacer unit comprismg frames having 111- tegral ears pivoted one to the other, stopv bars pivoted-to one outermost frame and means for interlocking said bars to the opposite outermost frame for the purpose specified.

In Witness whereof I have signed my name to this specification this 3rd day of October, 1917. Y

. REUBEN NEWMAN. [11.8.]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,-

Wasliington, D. C. 

